/sys$common/syshlp/helplib.hlb Sys Parameters, MPDEV_REMOTE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    (Alpha only) MPDEV_REMOTE enables MSCP served disks to become
    members of a multipath set when set to ON (1).  If set to OFF
    (0),  only local paths to a SCSI or Fibre Channel device will be
    used in the formation of additional multipath sets.

    However, setting this parameter to OFF will not have any effect
    on existing multipath sets that have remote paths. The default is
    OFF.

    For OpenVMS Alpha Version 7.3, this parameter must remain set to
    the default value of OFF (0). This restriction will be removed in
    a future release of OpenVMS.